Embedthis Appweb is a fast, little embedded Web server. It is unmatched in efficiency and serves pages at native speed, using an event-driven, non-blocking core to serve multiple requests using minimal resources. It has integrated caching and the Embedded Server Pages C-Language Web framework. Without compromising performance, it has extensive security controls and a rigorous security sandbox that helps protect the server and mitigate denial-of-service attacks. It is one of the most widely deployed embedded Web servers and is used in networking equipment, telephony, mobile devices, industrial control, and consumer and office equipment, and in high-performance Web services.
The CyaSSL embedded SSL library is a lightweight SSL library written in ANSI C and targeted for embedded and RTOS environments, primarily because of its small size, speed, and feature set. It is commonly used in standard operating environments and cloud services as well because of its royalty-free pricing and excellent cross platform support. CyaSSL supports industry standards up to the current TLS 1.2 and DTLS 1.2 levels, is up to 20 times smaller than OpenSSL, and offers progressive ciphers such as HC-128, RABBIT, and NTRU.
yaSSL is a C++ based SSL library for embedded and RTOS environments, designed for individuals who prefer to use the C++ language. For a C-based solution, please see CyaSSL. yaSSL supports the industry standards up to TLS 1.2, and also includes an OpenSSL compatibility interface.
Wt is a C++ library for developing Web applications with an API that is widget-centric and inspired by existing C++ graphical user interface APIs. To the developer, it offers abstraction of Web-specific implementation details, increasing the accessibility and portability. Under the hood, the library uses the latest techniques (HTML5, Ajax, WebSockets) to handle user events and update the Web page.
MatrixSSL is an embedded SSL and TLS implementation designed for small footprint devices and applications requiring low overhead per connection. The library is less than 50K on disk with cipher suites. It includes SSL and TLS client and server support, session resumption, and implementations of RSA, AES, 3DES, ARC4, SHA1, and MD5. The source is well documented and contains portability layers for additional operating systems, cipher suites, and cryptography providers.
Tntnet is a Web application server for generating Web applications in C++. HTML pages with some additional tags for inclusion of C++ code are compiled into shared libraries and served from tntnet. It resembles PHP, JSP, or Mason, but the programming language used is C++, and the pages are compiled into native code before serving. Tntnet is fully multithreaded and supports HTTP keep-alive for best performance. Its dynamic pages are faster than static pages with other Web servers, while creating Web applications is simple.
uIP is probably the smallest implementation of the TCP/IP protocol stack ever written in a high level language; the code footprint is on the order of a few kilobytes and RAM usage is on the order of a few hundred bytes. uIP is intended to be used in embedded systems running low end 8- and 16-bit microcontrollers.
KLone is a fully-featured, multi-platform framework which allows dynamic Web pages to be written in C/C++ (with the usual <% /* code */ %> style). The pages can then be embedded (in compressed and/or encrypted form) into a single executable that also contains KLone's high-performance HTTP/S server. Given its nature, it can be linked natively to any C/C++ library (database, XML, graphics, etc.), without an intermediate layer, and it is especially suited for low-resource (embedded) systems.
Zild is a C application server with support for the common servlet technology and servlet API in C. It includes support for ServerPages, PHP, XML SAX parser, HTTP/1.1 and SSL/TLS connectors, HTML form-based and Basic Authentication access controls, a built-in embedded SQL database, and many more functions.